Powder coatings are based on polymer resin systems, combined with curatives, pigments, leveling agents, flow modifiers, and other additives. These ingredients are melt mixed, cooled, and ground into a uniform powder similar to baking flour. A process called electrostatic spray deposition (ESD) is typically used to achieve the application of the powder coating to a metal substrate. This application method uses a spray gun, which applies an electrostatic charge to the powder particles, which are then attracted to the grounded part.
After application of the powder coating, the parts enter a curing oven where, with the addition of heat, the coating chemically reacts to produce long molecular chains, resulting in high cross-link density. These molecular chains are very resistant to breakdown. This type of application is the most common method of applying powders. Powder coatings can also be applied to non-metallic substrates such as plastics and medium density fiberboard (MDF).
SPECIFICATION |
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Coating film technical data |
Curing conditions
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180°C/20min, 190°C/15min, 200°C/10min
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Impact resistance(drop hammer)
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50kg.cm pass
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Pencil hardness
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H-2H
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Gloss(60°gauge head)
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High gloss type≥85% Semi gloss type:51-84% |
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Adhesion(cross cut test)
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1mm 6x6 0 grade
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Bending test(tapering spindle)
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3mm pass
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Salt Spray Test
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>500 hours
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Humidity resistance
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>1,000 hours
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Application recommendation |
Application Voltage
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60-80KV
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Film Thickness
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60-80 Micron
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Average coverage
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8-12 square meters/kg, thickness 60μm(100% of the powder coating utilization rate)
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Storage
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1 year. Store in ventilated, dry, clean room, temperature < 25℃, away from direct sunlight, rain, fire, heat.
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